Display screen with a graphical user interface



FIG. 1 is an enlarged front view of a portion of a display screen with a graphical user interface in FIG. 2; and,

FIG. 2 is a front view of a display screen with a graphical user interface.

Where applicable, elements are shown in broken lines herein illustrating a display screen and elements of a graphical user interface, and form no part of the claimed design. 

CLAIM The ornamental design for a display screen with a graphical user interface, as shown and described. 